Tenacity

[ForteNightshade]

To notice a change in things that are happening, first of all you need to look for the change that was made, second you need to really invest into the stat that's making the difference, if you don't care and don't do the content that really puts every point of side stats you have to the test, then who cares, meld whatever you're told and go.

The difference is always going to be minimal, in percentages, so if you're not interested in discussing very small percentages, there's no point in discussing side stats at all. As far as I'm concerned the difference i saw from doing Tenacity in TEA was that i required 2 less single target heals in P2, where the difference i see right now from using Skillspeed in E7S is that i get to cast 9 more Bloodspillers than the top DRK at the time.

But I'll lend credence to your claim and share the set of gear that maximizes Crit, then a set of gear that maximizes DH:

Crit -> DH: https://ffxiv.ariyala.com/1CE0G
DH: https://ffxiv.ariyala.com/1CE0K

Now we see that, in the Crit gear, compared to the Tenacity set, we have an increase of 3.5% DPS (in theory), with 3.79% passive damage mitigation.
And on the purely DH gear, compared to the Tenacity set, we have an increase of 2.7% DPS (in theory), with 3.79% passive damage mitigation.

So taking the Crit set, which should give the most DPS (again, in theory), we have a nice trade off, 3.5% more DPS at the loss of 5.6% passive damage mitigation, that's half a Reprisal except it's permanent.

Another virtue of non-RNG based sources of DPS is that it's more consistent, there's also that. Again, stop with the stigma, the stats are there, they have their uses, and in true spirit of FFXIV, you can resolve all content with any set of gear as long as it's the appropriate iLvl and it has materia in it.

Then you're mitigation was misplaced. I have cleared TEA and neither tank ran Tenacity. In fact, virtually no tanks use it even for Ultimate. If it were valuable enough to make a difference people would consider it more, especially during Ultimate. They don't. Hence why it's widely considered second rate at most. I have seen the numbers before and it speaks volumes that people still don't remotely consider Tenacity. Why is that? Because the passive mitigation it provides is so minuscule, it isn't worth melding over Determination or Direct Hit. If you prefer to meld it, well, Tenacity is better than nothing. But that's about it.

Saying you can clear any content is a cop out response. I could meld literally nothing and still clear without a single problem. That does not make Tenacity suddenly better nor desirable. The problem remains that until Tenacity provides a more noticeable benefit or Direct Hit is no longer an option for tanks, it simply lacks a purpose beyond being the cautious "feels safer" stat.